Brantford, Ontario – The Medical Officer of Health (MOH) for Grand Erie Public Health is issuing a heat alert for the Grand Erie Public Health region (Brantford‑Brant and Haldimand‑Norfolk), effective Tuesday, June 30, 2026.
A heat alert is issued by the MOH when Environment and Climate Change Canada issues a yellow‑level heat alert for the region, indicating that conditions may pose health risks for some individuals. Typically, these alerts are issued when Environment and Climate Change Canada forecasts two or more consecutive days with:
- Daytime high temperatures of 31°C or greater and minimum overnight temperatures of 20°C or greater,
or - Humidex values of 40°C or greater.
The heat alert will remain in effect until a cancellation notice is issued.
Hot and humid weather can increase the risk of heat‑related illness for everyone, particularly older adults, infants and young children, people with chronic health conditions, people who work or exercise outdoors, individuals experiencing homelessness, and those without access to air‑conditioned spaces.
Extreme heat can worsen existing health conditions and may lead toheat exhaustion or heat stroke. Warning signs of heat‑related illness include dizziness, headache, nausea or vomiting, weakness, confusion, fainting, and rapid breathing or heartbeat. Seek immediate medical attention if these symptoms occur.
To reduce the risk of heat‑related illness:
- Drink plenty of water and other non‑alcoholic, non‑caffeinated fluids.
- Spend time in air‑conditioned or cool spaces whenever possible.
- Take cool showers or baths to help lower body temperature.
- Limit outdoor activities during the hottest parts of the day.
- Wear lightweight, loose‑fitting, light‑coloured clothing and a wide‑brimmed hat when outdoors.
- Check on older adults, neighbours, family members, and others who may be more vulnerable during extreme heat.
- Never leave children or pets unattended in parked vehicles.
To learn more about preventing heat‑related illness during extreme heat events, visit geph.ca/heat.
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Grand Erie Public Health
As one of Ontario’s public health units, we are determined defenders of community health. Our public health focus on prevention, protection, and promotion contributes to healthier outcomes across Brantford, Brant, Haldimand, and Norfolk.
We are unshakeable in our commitment to being a trusted and authentic source of public health knowledge, guided by the Health Protection and Promotion Act and the Ontario Public Health Standards. We safeguard the well-being of everyone – no matter who they are or where they come from.